【摘要】 普通碱激发矿渣复合材料(AASC)通过浆料浇筑成型，内部存在许多大的气孔，并且有明显的裂纹，所以存在脆性大、强度低和容易断裂等问题。为了克服这些缺点，以矿渣为基体，硅酸钠为碱激发剂，铜纤维为增强体，用热压成型方法，制备了碱激发矿渣复合材料，通过XRD、SEM、抗压、抗弯强度、冲击韧性试验，以及孔隙率等测试方法，研究了铜纤维对热压成型碱激发矿渣复合材料(HP-AASC)力学性能的影响。结果表明：热压成型所制试样相较于浇筑成型试样各项力学性能均有所改善。在碱激发剂并且热压作用下，矿渣粉在原位发生水化反应，样品内部更加致密；当矿渣∶碱激发剂为3∶1,铜纤维含量7%时样品力学性能最好，抗压抗弯强度为149.72 MPa、27.07 MPa,冲击强度为0.44 J/cm~2,孔隙率小于5%;铜纤维对碱激发复合材料具有明显的增强增韧作用。更多还原

【Abstract】 Ordinary alkali-activated slag composites(AASC) were formed by slurry casting and had many large internal pores and visible cracks, so they led to problems such as high brittleness, low strength and easy fracture.To overcome these drawbacks, the study prepared alkali-activated slag composites using slag as the matrix, sodium silicate as the alkali activator, and copper fibers as the reinforcement by hot-press moulding.The effect of copper fibers on the mechanical properties of hot-press moulding alkali activated slag composites(HP-AASC) were tested using XRD,SEM,compression, flexural strength, impact toughness, porosity, and other methods.The results shown that the mechanical properties of the hot-press moulding samples were better than those of the casting moulding samples.The sample was more dense when slag powder reacts with the alkali activator during alkali activator and hot-press.The best mechanical properties were achieved when the slag∶alkali activator ratio was 3∶1 and the copper fiber content was 7%.The samples had compressive and bending strength of 149.72 MPa, 27.07 MPa, and an impact strength of 0.44 J/cm~2.They had less than 5% porosity.The copper fibers on the composites made them stronger and more durable.更多还原